There is also the argument that Windows 10 is "not a secure operating system" because by default it makes almost everything on your computer accessible to Microsoft, including your emails and contact lists. BTW, I know quite a few techies who are also die hard XP users. In general everyone hated Vista (is that news to anyone?), tolerated Windows 7, hated Windows 8, and are mixed on Windows 10.
I have been a user of JRiver software for a long time, going all the way back to Media Jukebox, and my first post in this forum was in 2005. So I guess that qualifies me as a loyal customer by some definition. I am not claiming any special rights or privileges on that account, however: One of the things customers like about JRiver is that the company is relatively open with its user base. When JRiver sent out two emails inviting users to pre-buy MC21, I responded. Neither of those emails mentioned that some features may cease to work for XP users as later builds of MC21 are released. So, what am I supposed to do? Install MC21, and then discover one day that a feature I use regularly isn't working because a new build has been downloaded and installed onto my computer? Honestly, I think that's a reasonable question. If it's only a matter of new features that are being added to MC21 that will not have any XP functionality, then I can live with that, even though I have paid for those features. But if it's a question of existing features that will cease to function at some point, then I take exception. If that is in the works, then JRiver should offer a refund to XP users who have already purchased an MC21 license. Out of loyalty to JRiver I would probably not accept that offer, but I believe it is the right thing to do. I also think that JRiver should devote a little bit more effort than usual to continue fixing bugs in MC20 after MC21 becomes the standard release version, since under this scenario many of us will continue using MC20.
As for me, I'm looking for a good Linux class...